Kitchen knife



FIG. 1 is a right side perspective view illustrating my kitchen knife design in a standing position on a support surface;

FIG. 2 is a side elevation view thereof, the opposite side view is identical;

FIG. 3 is a top plan view of my new design; and,

FIG. 4 is an end view of my new design.

The broken lines shown in FIGS. 1-4 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a kitchen knife, as shown and described. 